JP2003270489A - Optical connector adaptor and optical connector plug - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical connector adaptor and an optical connector plug that can be made low-cost and that can show superior electromagnetic wave shielding performance. <P>SOLUTION: The optical connector adaptor 10 is equipped with a sleeve holder 30 with a built-in optical connecting sleeve 20 and a housing 40 with a through hole 41 for holding this sleeve holder 30. In this optical connector adaptor 10, a layer 100 for shielding an electromagnetic wave is formed on at least the outer face of the housing 40, thereby showing superior electromagnetic wave shielding performance. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical connector adapter and an optical connector plug used for optically connecting optical fibers to each other.

[0002]

2. Description of the Related Art Conventionally, for example, an electronic device used in optical fiber communication or the like constantly generates an electromagnetic wave that affects the operation of other devices and systems from an electric circuit provided therein. It is known that such an electromagnetic wave causes a functional failure in other devices and causes a serious deterioration in functions of electronic devices.

Therefore, such an electronic device is covered with, for example, a metal exterior part or the like so as to prevent the electromagnetic wave from leaking to the outside, and has a structure for preventing electromagnetic interference to other devices. .

Such metal exterior parts are provided with a plurality of mounting portions for fitting various optical connectors, and an optical fiber drawn from an electric circuit or the like through these optical connectors and an external portion. It is designed to be optically connected to an optical fiber.

Here, the optical connector includes, for example, an optical connector plug containing a ferrule in which an optical fiber is inserted and held, and an optical connector sleeve in which the optical connector plug is inserted from both sides so as to be connected to each other. It consists of a connector adapter.

Therefore, in such an optical connector, in general, an optical connector adapter is fitted in a mounting portion of an exterior part, and an optical fiber is drawn into the mounting portion from both sides of the optical connector adapter, for example, from an electronic device. The optical connector plug holding the optical fiber and the external optical fiber are inserted, and the optical connector is held in the optical connection sleeve for optical connection.

However, since the conventional optical connector adapter is usually formed of a plastic material or the like,
Even if it is fitted into the mounting part, the electromagnetic wave leaks out from the mounting part, resulting in electromagnetic compatibility (Electroma compatibility).
gnectic Compatibility: EMC)
Sometimes it did not comply with the directive. In addition, such EM
Compliance with the C directive generally means that the electronic device operates safely and reliably without causing electromagnetic interference.

Therefore, in order to comply with the EMC directive, recently, for example, an optical connector adapter is formed by zinc die casting or the like, or the outer circumference of the plastic optical connector adapter is covered with a metal plate or the like. As a result, electromagnetic wave countermeasures have been adopted to prevent electromagnetic interference to other devices.

[0009]

However, of the electromagnetic wave countermeasures described above, the former zinc die-cast optical connector adapter has a problem that the cost is higher than that of the plastic optical connector adapter. Also,
Since the MU type and LC type optical connector adapters are smaller than other types, it is relatively difficult to mold them with a metal material such as zinc die cast.

On the other hand, in the latter optical connector adapter, in general, after manufacturing a pair of metal plates having a U-shaped vertical section, the outer periphery of the optical connector adapter is sandwiched between the pair of metal plates. Is assembled by. Therefore, it is necessary to process a pair of metal plates requiring a complicated structure, which complicates the manufacturing process of the optical connector adapter and increases the number of parts, which makes it difficult to reduce costs. There is.

The above-mentioned metal plate is usually manufactured by progressive molding, and it is expensive if a lot of several hundreds to several millions is not obtained per manufacturing lot. For this reason, there is also a drawback that it is not suitable for small-quantity production in order to obtain several tens to tens of thousands of pieces per lot.

In view of such circumstances, it is an object of the present invention to provide an optical connector adapter and an optical connector plug which can realize cost reduction and can exhibit excellent electromagnetic wave shielding performance.

[0013]

A first aspect of the present invention for solving the above problems is an optical system comprising a sleeve holder containing an optical connection sleeve and a housing having a through hole for holding the sleeve holder. In the connector adapter, there is provided an optical connector adapter in which a metal layer that shields electromagnetic waves is formed on at least an outer surface of the housing.

According to a second aspect of the present invention, in the first aspect, at least the metal layer is formed on an outer surface exposed from the device body when the electronic device is attached to the device body. The optical connector adapter is characterized by.

A third aspect of the present invention is the optical connector adapter according to the first or second aspect, characterized in that the metal layer is formed by plating.

A fourth aspect of the present invention is the optical connector adapter according to any one of the first to third aspects, characterized in that the metal layer is formed by sputtering or vapor deposition.

A fifth aspect of the present invention is the optical connector adapter according to any one of the first to fourth aspects, wherein the metal layer has at least a copper layer.

A sixth aspect of the present invention is the optical connector adapter according to any one of the first to fourth aspects, wherein the metal layer has at least an aluminum layer.

A seventh aspect of the present invention is the optical connector adapter according to any one of the first to fourth aspects, wherein the metal layer is formed by laminating a copper layer and a nickel layer. It is in.

An eighth aspect of the present invention is the electroless copper plating layer according to any one of the first to third aspects, wherein the metal layer is formed on the outer surface of the housing, and the electroless copper plating layer. An optical connector adapter including an electrolytic copper plating layer formed on the optical connector adapter.

A ninth aspect of the present invention is an optical connector adapter according to the seventh or eighth aspect, characterized in that the metal layer includes an electric nickel plating layer formed on the electric copper plating layer. is there.

In a tenth aspect of the present invention, in any one of the first to ninth aspects, the housing is polybutylene terephthalate (PBT), polycarbonate (PC),
Acrylonitrile-butadiene-styrene copolymer (A
BS), polyether imide (PEI), polyamide (PA), polyethylene terephthalate (PET) and liquid crystal polymer (LCP), which is a kind of plastic material or a composite plastic material thereof. It is a feature of the optical connector adapter.

An eleventh aspect of the present invention is the same as the tenth aspect, wherein the housing is made of PBT, PEI and LCP.
An optical connector adapter characterized by being formed of a kind of plastic material selected from the group consisting of or a glass fiber reinforced plastic material obtained by adding glass fiber to a composite plastic material thereof.

A twelfth aspect of the present invention is the optical connector adapter according to any one of the first to eleventh aspects, which is an MU type, LC type or SC type optical connector adapter.

A thirteenth aspect of the present invention is an optical connector plug comprising a ferrule in which an optical fiber is inserted and held, and a plug housing holding the ferrule, and a metal for shielding electromagnetic waves from at least the outer surface of the plug housing. An optical connector plug is characterized in that layers are formed.

According to a fourteenth aspect of the present invention, in the thirteenth aspect, at least the metal layer is formed on an outer surface exposed from the adapter part when the optical connection sleeve is attached to the adapter part. It is in an optical connector plug that is characterized by having.

The fifteenth aspect of the present invention is the thirteenth or fourteenth aspect.
In another aspect, the optical connector plug is characterized in that the metal layer is formed by plating.

[0028] A sixteenth aspect of the present invention is the optical connector plug according to any one of the thirteenth to fifteenth aspects, wherein the metal layer is formed by sputtering or vapor deposition.

A seventeenth aspect of the present invention is the optical connector plug according to any one of the thirteenth to sixteenth aspects, wherein the metal layer has at least a copper layer.

An eighteenth aspect of the present invention is the optical connector plug according to any one of the thirteenth to sixteenth aspects, wherein the metal layer has at least an aluminum layer.

A nineteenth aspect of the present invention is the optical connector according to any one of the thirteenth to sixteenth aspects, wherein the electromagnetic wave shield layer is formed by laminating a copper layer and a nickel layer. On the plug.

In a twentieth aspect of the present invention according to any one of the thirteenth to fifteenth aspects, the electromagnetic wave shield layer is an electroless copper plating layer formed on an outer surface of the plug housing, and the electroless copper layer. An optical connector plug including an electrolytic copper plating layer formed on the plating layer.

The twenty-first aspect of the present invention is the nineteenth or twentieth aspect.
In another aspect, the electromagnetic wave shield layer includes an electrical nickel plating layer formed on the electrical copper plating layer.

A twenty-second aspect of the present invention is any of the thirteenth to twenty-first aspects, wherein the plug housing is polybutylene terephthalate (PBT), polycarbonate (PC), acrylonitrile-butadiene-styrene copolymer (ABS). ), Polyetherimide (PEI), polyamide (PA), polyethylene terephthalate (PE
T) and a liquid crystal polymer (LCP), which is a kind of plastic material selected from the group consisting of or a composite plastic material thereof.

In a twenty-third aspect of the present invention, in the twenty-second aspect, the plug housing is made of a plastic material selected from the group consisting of PBT, PEI, and LCP, or a composite plastic material thereof in which glass fiber is added. The optical connector plug is characterized by being formed of the glass fiber reinforced plastic material.

A twenty-fourth aspect of the present invention is the optical connector plug according to any one of the thirteenth to twenty-third aspects, which is an MU type, LC type or SC type optical connector plug.

According to the present invention, an electromagnetic wave shield layer for shielding electromagnetic waves is provided on at least the outer surface of the housing of the optical connector adapter or at least the outer surface of the plug housing of the optical connector plug, thereby reducing the number of parts and drastically reducing the cost. In addition, excellent electromagnetic wave shielding performance can be exhibited.

[0038]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

(Embodiment 1) FIG. 1 is an exploded perspective view of an optical connector adapter according to Embodiment 1 of the present invention.
FIG. 4 is a perspective view in which a part of the assembled state is cut away. Also,
FIG. 3 is an enlarged sectional view of a main part of the optical connector adapter.

As shown in the figure, the optical connector adapter 10 of this embodiment is a MU type optical connector adapter,
Optical connection sleeve 20 into which the tip of the ferrule is inserted
And a sleeve holder 30 in which the optical connection sleeve 20 is incorporated, and an integral housing 40 in which the sleeve holder 30 is held.

The optical connection sleeve 20 has a cylindrical shape and has a ferrule insertion hole 21 penetrating it in the axial direction and a slit 22 provided from one end side to the other end side in the longitudinal direction. Have and. Further, the ferrule insertion hole 21 is formed with an inner diameter slightly smaller than the outer diameter of the tip portion of the ferrule.

Although not shown, the ferrule insertion holes 21 of such an optical connection sleeve 20 are adapted to be optically connected by inserting the front end portions of the ferrules from openings on both sides thereof. At this time, since the optical connection sleeve 20 is elastically deformed in the direction in which the slit 22 is expanded by inserting the tip portion of the ferrule,
The tip portion of the ferrule is closely held on the inner surface of the ferrule insertion hole 21 so as to be oppositely connected.

Further, the sleeve holder 30 is provided with a first cylindrical body 32 forming one longitudinal end of the through hole 31 in which the optical connection sleeve 20 is incorporated.

A stopper claw 3 for locking the optical connection sleeve 20 is provided at one axial end of the first tubular body 32.
3 is projected inward in the radial direction, and a rectangular flange portion 34 is provided on the outer periphery of the other end portion.

Further, on both short sides of the flange portion 34,
Guide members 35 protruding so as to sandwich the first tubular body 32 and a second tubular body of a housing 40 described later are provided respectively. Each of the guide members 35 has an outer shape that fits into a guide groove provided in the housing 40 described later.

A pair of engaging claws 36 are provided on the inner surface of the guide member 35 on the side of the first tubular body 32, and a housing 40 is provided on the outer surface of the guide member 35.
A locking projection 37 that locks the sleeve holder 30 is provided therein. It should be noted that such an engaging claw 36 is for coupling with an MU type optical connector plug, which will be described later in detail.

Here, the housing 40 has a cylindrical shape, and has a through hole 41 for holding the sleeve holder 30, and a guide member 35 provided so as to face the inner surface of the through hole 41.
A guide groove 42 into which is inserted and a locking hole 43 into which the locking projection 37 of the guide member 35 is engaged are provided.

An abutting portion 44 with which the flange portion 34 abuts is provided at the central portion in the axial direction within the through hole 41. Insertion holes 45 through which the guide member 35 is inserted are provided on both short sides of the contact portion 44.

A second tubular body 46 is axially provided at the center of the abutting portion 44, and an optical connection sleeve is provided at the tip of the second tubular body 46. A stopper claw 47 that locks 20 is provided so as to project radially inward.

On the other hand, on the side surface of the housing 40 where the locking hole 43 is provided, there is provided a protrusion 48 which is inserted into a mounting portion of the apparatus main body described later.

An electromagnetic wave shield layer 100 for shielding electromagnetic waves is formed on the outer surface of the housing 40. The electromagnetic wave shield layer 100 is formed of, for example, a metal layer having an electromagnetic wave shield performance, and includes a copper layer formed on the outer surface of the housing 40 and a nickel layer laminated on the copper layer. . In this embodiment, as shown in FIG. 3, the electromagnetic wave shield layer 100 is formed by stacking the electroless copper plating layer 101, the electrolytic copper plating layer 102, and the electrolytic nickel plating layer 103 on the outer surface of the housing 40. ing.

Here, a method of forming the electromagnetic wave shield layer 100 on the outer surface of the housing 40 will be described.

Specifically, first, the electroless plating layer 101
As a pre-treatment for forming, the outer surface of the housing 40 is subjected to surface treatment such as degreasing, etching, catalyzing treatment, that is, surface roughening. As a result, the electroless copper plating layer 101 having excellent adhesion is provided on the outer surface of the housing 40.
Can be formed.

The material of the housing 40 is not particularly limited as long as it can be subjected to the above-mentioned surface treatment, and examples thereof include polybutylene terephthalate (PBT), polycarbonate (PC), acrylonitrile-butadiene-styrene. Examples thereof include a plastic material such as a copolymer (ABS), a polyetherimide (PEI), a polyamide (PA), a polyethylene terephthalate (PET) and a liquid crystal polymer (LCP), or a composite plastic material thereof.

Further, as the other material of the housing 40, for example, a plastic material of PBT, PEI and LCP or a glass fiber reinforced plastic material obtained by adding glass fiber to a composite plastic material thereof may be used. In this case, since the outer surface of the housing 40 is a rough surface to some extent, the electroless copper plating layer 101 can be satisfactorily formed without the above-described surface roughening process.

Next, an electroless copper plating layer 101 is formed on the surface-treated outer surface of the housing 40. At this time, in this embodiment, the inside of the through hole 41 of the housing 40 is masked.

As a result, the electroless copper plating layer 101 can be selectively formed only on the outer surface of the housing 40. Further, in the present embodiment, since the electromagnetic wave shield layer 100 is not formed on the inner surface of the housing 40, that is, the inner surface of the through hole 41, it is possible to satisfactorily fit the optical connector plug described later.

Next, such an electroless copper plating layer 10 is formed.
1, an electrolytic copper plating layer 102 is formed by electroplating, and a nickel plating layer 103 is further formed on the electrolytic copper plating layer 102 by the same method. Thereby, the electromagnetic wave shield layer 100 is formed on the outer surface of the housing 40.

As described above, by forming the electroless plating layer 101 and the copper electroplating layer 102 made of copper, which is a plating material having high conductivity, on the outer surface of the housing 40, excellent electromagnetic wave shielding performance is exhibited. be able to. Further, in the present embodiment, a desired electromagnetic wave shielding performance can be obtained with only such a copper layer, but by forming the electric nickel plating layer 103 as a protective layer on the copper layer, for example, rust prevention and corrosion can be achieved. Etc. can be made durable.

Further, such an electromagnetic wave shield layer 100
In this embodiment, the thickness of the copper layer is made relatively larger than the thickness of the nickel layer. This is because copper is a plating material having a lower hardness than nickel, so that the copper layer absorbs stress due to the difference in thermal expansion coefficient between copper and nickel. Thereby, it is possible to surely prevent the electromagnetic wave shield layer 100 from being damaged such as peeling or cracking.

For example, in the present embodiment, the thickness of the electrolytic copper plating layer 102 and the nickel plating layer 103 is set to 10 so that the electromagnetic shield layer 100 can be prevented from being damaged. ˜20 μm, the thickness of the electroless nickel plating layer 103 was 5 to 10 μm, and the thickness of the electroless copper plating layer 101 was 0.25 to 2 μm.

Here, the optical connector adapter 10 described above is used.
Is attached to an apparatus main body 60 having an electronic device and the like as shown in FIG. 4A and 4B are schematic diagrams showing a mounting state of the MU type optical connector adapter according to the first embodiment of the present invention, in which FIG. 4A is a top view and FIG.
Is a partial sectional view.

As shown in FIG. 4, the apparatus body 60 is provided with a mounting portion 61 into which the optical connector adapter 10 is fitted. The mounting portion 61 has an opening shape into which a portion of the housing 40 of the optical connector adapter 10 provided with the protrusion 48 of the housing 40, which is slightly larger than the outer shape of the housing 40, can be inserted. The optical connector plug holding the tip of the fiber is pulled out.

The protrusion 48 of the housing 40 of the optical connector adapter 10 is inserted into the mounting portion 61, and an engaging member (not shown) such as a leaf spring member is engaged with the mounting portion 61. To do. As a result, the optical connector adapter 10 can be attached to the attachment portion 61 of the device body 60.

As described above, in this embodiment, the optical connector adapter 10 having the electromagnetic wave shield layer 100 formed on the outer surface of the housing 40 is attached to the mounting portion 61 of the apparatus body 60.
By fitting into the device main body 60, it is possible to favorably prevent the electromagnetic waves generated in the electronic device or the like provided in the device body 60 from leaking to the outside. That is, according to the optical connector adapter 10 of the present embodiment, it is possible to exhibit excellent electromagnetic wave shielding performance against electromagnetic waves leaking from the inside of the device body 60 through the optical connector adapter 10 mounted on the mounting portion 61. it can.

As a result, it is possible to surely prevent the electromagnetic interference to other devices and to exert an excellent effect as a countermeasure against electromagnetic waves. Further, it is possible to ensure conformity to the above-mentioned EMC command and improve the reliability of the optical connector adapter 10.

Further, since it is not necessary to separately provide a metal plate or the like having a complicated shape on the outer peripheral surface of the optical connector adapter 10, the work process at the time of manufacturing can be simplified and the number of parts can be reduced, resulting in low cost. Can be realized. Further, since it can be manufactured regardless of the number of pieces taken per lot, it has excellent productivity.

Now, an optical connector plug corresponding to the above-mentioned MU type optical connector adapter 10 will be described. Note that FIG. 5 is a schematic diagram of the MU type optical connector plug according to the present embodiment, in which (a) is a perspective view,
(B) is a principal part top view which shows an assembly state.

As shown in FIG. 5, the optical connector plug 50 of the present embodiment is a MU type optical connector plug, and includes a plug frame 52 holding the ferrule 51 and an MU type connector fitted to the plug frame 52. And a plug housing 53 adapted to the shape.

In this embodiment, the electromagnetic wave shield layer 100 for shielding electromagnetic waves similar to that of the optical connector adapter 10 described above is also formed on the outer surface of the plug housing 53.

Specifically, when the optical connector plug 50 is fitted into the through hole 41 of the optical connector adapter 10 described above, the electromagnetic wave shield layer 100 is formed on the exposed outer surface of the plug housing 53 of the optical connector plug 50. Has been done. When forming the electromagnetic wave shield layer 100, the outer surface of the plug housing 53 on which the electromagnetic wave shield layer 100 is not formed is masked and the other outer surface is plated.

In this embodiment, such an optical connector plug 50 is fitted into the through hole 41 of the optical connector plug 10 after the optical connector plug 10 is fitted into the mounting portion 61 of the apparatus body 60 described above. .

As a result, a slight electromagnetic wave leaking through the inside of the optical connector adapter 50 can be completely prevented, and excellent electromagnetic wave shielding performance can be exerted to improve the reliability of the optical connector adapter 10 and the optical connector plug 50. It can be further improved. The electromagnetic wave shield layer 100 may be formed on one side of the pair of optical connector plugs 50 fitted into the optical connector adapter 10, but of course, it should be formed on both sides in the sense of effectively preventing electromagnetic interference. Is preferred.

Further, by providing the electromagnetic wave shield layer 100 on the outer surface of the housing 40 of the optical connector adapter 10 and the outer surface of the plug housing 53 of the optical connector plug 50, it is possible to prevent the optical connector plug 50 from being charged with static electricity. it can. This allows the ferrule 51
Since foreign matter such as dust or dirt does not adhere to the end surface of the optical fiber due to static electricity, optical connection between the optical fibers can be favorably performed.

(Second Embodiment) FIG. 6 is a schematic view showing an SC type optical connector adapter according to a second embodiment of the present invention, in which (a) is a perspective view and (b) is an assembled state. It is a principal part top view shown.

As shown in FIG. 6, the optical connector adapter 10B of this embodiment is an SC type optical connector plug, and the electromagnetic wave shield layer 10 similar to that of the above-described Embodiment 1 is used.
0 is formed on the outer surface of the integral housing 40B.

Further, in this embodiment, a similar electromagnetic wave shield layer 100 is also provided on the exposed outer surface of the plug housing 51B when the SC type optical connector plug 50B is fitted to the optical connector adapter 10B. . In addition,
Since the configurations of the SC type optical connector adapter 10B and the optical connector plug 50B are basically the same as those of the MU type of the above-described first embodiment, duplicate description will be omitted.

As described above, by providing the electromagnetic wave shield layer 100 on the outer surfaces of the SC type optical connector adapter 10B and the optical connector plug 50B, the above-described first embodiment is described.
The same effect as can be obtained.

In this embodiment, the SC type optical connector adapter 10B having the integrated housing 40B is illustrated, but the present invention is not limited to this, and for example, a separate type housing 40C as shown in FIG. 7 is used. The SC type optical connector adapter 10B may be used. 7. FIG. 7 is a schematic perspective view showing another example of the SC type optical connector adapter according to the second embodiment of the present invention.

Specifically, as shown in FIG. 7, if an electromagnetic wave shield layer 100 similar to that of the above-described first embodiment is formed on the outer surface of the housing 40C that is divided in two in the axial direction, the above-mentioned first embodiment is obtained. The same effect can be obtained.

Further, the SC type optical connector plug of the present embodiment has a built-in sleeve holder (not shown) which is divided into two parts by the flange portion described in the first embodiment. Of course, the structure of such a sleeve holder divided into two is not particularly limited.

The electromagnetic wave shield layer 10 is integrally bonded to the outer surface of such a separate type housing 40B.
0 may be formed, and the electromagnetic wave shield layer 1 is formed in different states.
00 may be formed. In any case,
The electromagnetic wave shield layer 100 is formed in a state where the portion other than the outer surface of the housing 40B is masked. However, in the latter case, the electromagnetic wave shield layer 100 may be formed in a separate state by masking each joint surface of each housing.

(Third Embodiment) FIG. 8 is a schematic view of an LC type optical connector adapter according to a third embodiment of the present invention, in which (a) is an exploded perspective view and (b) is an assembled state. It is a perspective view shown.

As shown in FIG. 8, the optical connector adapter 10D of the present embodiment is an LC type optical connector adapter, and the electromagnetic wave shield layer 10 similar to that of the above-described Embodiment 1 is used.
0 is formed on the outer surfaces of separate housings 70 and 71.

Specifically, the optical connector adapter is an LC
Has a structure for holding two optical connector plugs (not shown) of a mold, and an insertion hole 72 into which each optical connector plug is inserted
Are juxtaposed. An optical connector plug is attached to each of the insertion holes 72 by latching.

Further, the optical connecting sleeve 7 is provided on each of the connecting surfaces 73 for connecting the housings 70, 71 to each other.
4 is provided with a sleeve holding hole 75. Further, the housings 70, 7 are provided on one side of the connecting surface 73.
A protrusion 76 for connecting one to the other is provided, and a recess 77 into which the protrusion 76 fits is provided on the other surface side.

The housings 70, 71 are connected to each other by fitting the protrusions 76 and the recesses 77 together. At this time, the optical connection sleeves 74 are incorporated in the respective sleeve holding holes 75.

The electromagnetic wave shield layer 100 similar to that of the above-described first and second embodiments is formed on the outer surface of the housings 70 and 71 other than the connecting surface 73. In addition,
The electromagnetic wave shield layer 100 is formed on a predetermined outer surface of each housing 70, 71 in a masked state.

Such an optical connector adapter 10D is
As shown in FIG. 8B, the housings 70, 71 are assembled by integrally connecting them. Then, the optical connector adapter 10D is attached to a device body (not shown).

Thus, even if the electromagnetic wave shield layer 100 is formed on the LC type optical connector adapter 10D of this embodiment, the same effects as those of the above-described first and second embodiments can be obtained.

In the present embodiment, the optical connector adapter 10D holding two pairs of optical connector plugs has been described as an example, but the present invention is not limited to this, and one optical connector plug is used.
It may be an optical connector plug that holds a plurality of pairs or a plurality of pairs of three or more.

The electromagnetic wave shield layer 10 is also formed on the outer surface of the LC type optical connector plug which is attached to the LC type optical connector adapter 10D of this embodiment by latching.
0 may be formed, and in this case, the optical connector adapter 1
Since the portion to be latched at 0D is elastically deformed, it may be formed on the outer surface excluding the portion. This is to prevent the electromagnetic wave shield layer 100 from being defective due to elastic deformation.

(Other Embodiments) The first to third embodiments have been described above, but the present invention is not limited to such a configuration.

For example, in the above-described first to third embodiments, the electromagnetic wave shield layer 100 is formed on the entire outer surface of the optical connector adapter 10, 10B, but the invention is not limited to this, and at least the electromagnetic wave may leak out. You may make it partially form corresponding to a certain area | region.

For example, the electromagnetic wave shield layer may be formed on the outer surface of the housing exposed from the device body when the optical connector adapter is fitted into the mounting portion of the device body in which the electronic device or the like is incorporated.

Further, it may be formed on the inner surface of the housing of the optical connector adapter, that is, on a part or the whole of the inner surface of the through hole. In this case, it is desirable that the through hole of the optical connector adapter be formed in a size considering the thickness of the electromagnetic wave shield layer so that the through hole of the optical connector adapter can be properly fitted to the mounting portion of the device body or the optical connector plug. Of course, each mounting portion and the optical connector plug may be formed to have desired dimensions in consideration of the thickness of the electromagnetic wave shield layer.

Further, when the optical connector plug is fitted into the optical connector adapter, the optical connector plug is formed not only on the exposed outer surface of the plug housing but also on the outer surface of the plug housing which comes into contact with the optical connector adapter. Good.

As described above, according to the present invention, the electromagnetic wave shield layer for shielding electromagnetic waves is formed on at least the outer surface of the housing of the optical connector adapter or the plug housing of the optical connector plug, that is, a part or the whole of the outer surface. If there is, it is not particularly limited.

Further, in the above-described first embodiment, the MU type integrated optical connector adapter 10 holding a pair of MU type optical connector plugs 50 is exemplified, but the present invention is not limited to this, and a separate type optical connector adapter. Or an optical connector adapter that holds two or more pairs of optical connector plugs 50. In the case of a separate type optical connector adapter, the electromagnetic wave shield layer 100 is formed in a state where the joint surface for joining the housings is masked.

Further, in the above-described third embodiment, the separate type LC type optical connector adapter has been described as an example.
The present invention is not limited to this, and may be, for example, an integrated optical connector adapter. Of course, even in the case of such an integrated optical connector adapter, it may have a structure for holding a plurality of pairs of optical connector plugs such as one pair or three or more pairs.

Furthermore, in the first to third embodiments described above,
The MU-type, SC-type, and LC-type optical connector adapters have been described as examples, but the present invention is not limited to this, and optical devices formed of a material such as plastic that propagates electromagnetic waves, such as a multi-core optical connector or a fixed type. It may be an optical device having a built-in module such as an optical attenuator. The present invention exerts a particularly excellent effect on a small-sized optical device, but of course, is also effective for a large-sized optical device.

In any case, according to the present invention, an electromagnetic wave shield layer is provided for a device which is attached to a device or equipment in which an electronic device or the like which constantly emits electromagnetic waves is incorporated and which requires countermeasures against electromagnetic waves. Therefore, it is effective as an excellent countermeasure against electromagnetic waves.

Furthermore, in the above-described first to third embodiments, the electromagnetic wave shield layer 100 is formed by plating, but the present invention is not limited to this. For example, a sputtering method, a vacuum thick film vapor deposition method, a high frequency ion plating method, or the like method may be used. The electromagnetic wave shield layer may be formed by. Of course,
With such a method, the same effect as described above can be obtained.

In the first to third embodiments described above, the electromagnetic wave shield layer 100 is formed by laminating the electroless copper plating layer 101, the electrolytic copper plating layer 102 and the electrolytic nickel plating layer 103. The combination of the layers and the nickel layer is not limited, and may be formed of, for example, a metal layer having an electromagnetic wave shielding property such as aluminum. Of course, the metal material forming such a metal layer is
It is not limited as long as it can be applied to various methods capable of reliably forming the electromagnetic wave shield layer.

[0105]

As described above, according to the present invention,
Since an electromagnetic wave shielding layer that shields electromagnetic waves is formed on at least the outer surface of the housing of the optical connector adapter or at least the outer surface of the plug housing of the optical connector plug, it should exhibit excellent electromagnetic wave shielding performance when applied as a countermeasure against electromagnetic waves. You can Further, it is possible to reduce the number of parts and realize cost reduction.

[Brief description of drawings]

FIG. 1 is an exploded perspective view of an MU type optical connector adapter according to a first embodiment of the present invention.

FIG. 2 is a partial cross-sectional perspective view of an MU type optical connector adapter according to the first embodiment of the present invention.

FIG. 3 is an enlarged sectional view of an essential part of the MU type optical connector adapter according to the first embodiment of the present invention.

FIG. 4 is a schematic view showing a mounting state of the MU type optical connector adapter according to the first embodiment of the present invention, FIG.
Is a top view of the optical connector adapter, and (b) is a partial cross-sectional view of the optical connector adapter.

FIG. 5 is a schematic view of the optical connector plug according to the first embodiment of the present invention, in which (a) is a perspective view and (b) is a plan view of relevant parts showing an assembled state.

FIG. 6 is a schematic view of an SC type optical connector adapter according to a second embodiment of the present invention, in which (a) is a perspective view,
(B) is a principal part top view which shows an assembly state.

FIG. 7 is a schematic perspective view showing another example of the SC type optical connector adapter according to the second embodiment of the present invention.

FIG. 8 is a schematic view of an LC type optical connector adapter according to a third embodiment of the present invention, (a) is an exploded perspective view, and (b) is a perspective view showing an assembled state.

[Explanation of symbols]

10 Optical connector adapter 20 Optical connection sleeve 30 Sleeve holder 40 housing 41 through hole 50 optical connector plug 51 ferrule 52 plug frame 53 plug housing 60 Device body 61 Attachment 100 Electromagnetic wave shield layer 101 Electroless copper plating layer 102 Electrolytic copper plating layer 103 Electric nickel plating layer

Claims (24)

[Claims] 1. An optical connector adapter comprising a sleeve holder having a sleeve for optical connection therein and a housing having a through hole for holding the sleeve holder, wherein a metal layer for shielding electromagnetic waves is formed on at least an outer surface of the housing. Optical connector adapter characterized in that 2. The optical connector adapter according to claim 1, wherein at least the metal layer is formed on an outer surface exposed from the device main body when the electronic device is attached to the device main body. Optical connector adapter. 3. The optical connector adapter according to claim 1 or 2, wherein the metal layer is formed by plating. 4. The optical connector adapter according to claim 1, wherein the metal layer is formed by sputtering or vapor deposition. 5. The optical connector adapter according to claim 1, wherein the metal layer has at least a copper layer. 6. The optical connector adapter according to claim 1, wherein the metal layer has at least an aluminum layer. 7. The optical connector adapter according to any one of claims 1 to 4, wherein the metal layer is formed by laminating a copper layer and a nickel layer. . 8. The optical connector adapter according to claim 1, wherein the metal layer is an electroless copper plating layer formed on an outer surface of the housing, and the electroless copper plating layer. An optical connector adapter comprising an electrolytic copper plating layer formed on the optical connector adapter. 9. The optical connector adapter according to claim 7, wherein the metal layer includes an electric nickel plating layer formed on the electric copper plating layer. 10. The optical connector adapter according to claim 1, wherein the housing is polybutylene terephthalate (PBT), polycarbonate (PC), acrylonitrile-butadiene-styrene copolymer (ABS). , Polyetherimide (PEI), Polyamide (PA), Polyethylene terephthalate (PE
An optical connector adapter formed of a kind of plastic material selected from the group consisting of T) and liquid crystal polymer (LCP) or a composite plastic material thereof. 11. The optical connector adapter according to claim 10, wherein the housing is PBT, PEI and L.
An optical connector adapter, which is formed of a glass fiber reinforced plastic material obtained by adding glass fiber to a kind of plastic material selected from the group consisting of CP or a composite plastic material thereof. 12. The optical connector adapter according to claim 1, wherein the optical connector adapter is MU type, LC type or SC type.
Optical connector adapter, which is a type optical connector adapter. 13. An optical connector plug comprising a ferrule in which an optical fiber is inserted and held, and a plug housing holding the ferrule, wherein a metal layer for shielding electromagnetic waves is formed on at least an outer surface of the plug housing. Optical connector plug characterized by. 14. The optical connector plug according to claim 13, wherein at least the metal layer is formed on an outer surface exposed from the adapter part when the optical connection sleeve is attached to the adapter part. Optical connector plug characterized by. 15. The optical connector plug according to claim 13 or 14, wherein the metal layer is formed by plating. 16. The optical connector plug according to claim 13, wherein the metal layer is formed by sputtering or vapor deposition. 17. The optical connector plug according to claim 13, wherein the metal layer has at least a copper layer. 18. An optical connector plug according to claim 13, wherein the metal layer has at least an aluminum layer. 19. The optical connector plug according to any one of claims 13 to 16, wherein the metal layer is formed by stacking a copper layer and a nickel layer. . 20. The optical connector plug according to claim 13, wherein the metal layer is an electroless copper plating layer formed on an outer surface of the plug housing, and the electroless copper plating. An optical connector plug, comprising: an electrolytic copper plating layer formed on the layer. 21. The optical connector plug according to claim 19 or 20, wherein the metal layer includes an electrical nickel plating layer formed on the electrical copper plating layer. 22. The optical connector plug according to claim 13, wherein the plug housing is polybutylene terephthalate (PBT), polycarbonate (PC), acrylonitrile-butadiene-styrene copolymer (ABS). ), Polyetherimide (PE
I), polyamide (PA), polyethylene terephthalate (PET) and liquid crystal polymer (LCP), which is formed of one kind of plastic material selected from the group or a composite plastic material of these, which is an optical connector plug. 23. The optical connector plug according to claim 22, wherein the plug housing is a kind of plastic material selected from the group consisting of PBT, PEI and LCP, or a glass material obtained by adding glass fiber to a composite plastic material thereof. An optical connector plug characterized by being formed of a fiber-reinforced plastic material. 24. The optical connector plug according to claim 13, wherein the optical connector plug is MU type, LC type or SC type.
Optical connector plug, which is a type optical connector plug.